Bobbin stripping device



Oct. 22, 1963 R. G. SENN 3,107,700

BOBBIN STRIPPING DEVICE Filed Jan. 27, 1961 6 Sheets-Sheet l Oct. 22, 1963 R. G. SENN BOBBIN STRIPPING DEVICE e Sheets-Shet 2 Filed Jan. 27, 1961 INVENTOR.

0a. 22, 1963 R. G. SENN 3, 0

BOBBIN STRIPPING DEVICE Filed Jan. 27, 1961 6 Sheets-Sheet 3 Fig. 3

IN VENTOR.

Filed Jan 27, 1961 BOBBIN STRIPPING DEVICE 6 Sheets-Sheet 4 INVENTOR.

Oct. 22, 1963 R. GSSENN BOBBIN STRIRPING DEVICE 6 Sheets-Sheet 5 Filed Jan. 27, 1961 INVENTOR.

Oct. 22, 1963 R. cs. SENN BOBBIN. STRIPPING DEVICE 6 Sheets-Sheet 6 Filed Jan. 27, 1961 IN VENTOR.

United States Patent 3,197,799 BfiBiidN STRJWFINU BEVIQE Rudolf Gottlieb Senn, Schatihansen, Switzerland, assignor to Georg Fischer Alrtiengeselischaft, Schaiihanscn,

Switzerland Filed Ian. 27, 1%1, filer. No. 85,323 Claims priority, application Switzerland Feb. 4, U66 3 Claims. (Cl. 139-262) The present invention relates to a device for removing yarn res-ts or yarn ends from yarn carriers, especially shuttle bobbins, comprising a head and a shank with a rotary body having its circumference partially provided with brush-like stripping means, said rotary body being arranged substantially coaxially with said yarn carrier and engaging the same.

Arrangements are known which are mounted on a loom and which, whenever a bobbin exchange .is effected, catch the ejected yarn carrier with the yarn or thread rest or remainder thereon. In this catching position, the yarn remainder is unwound from the yarn carrier by means of a rotatable body substantially coaxially arranged with regard to the yarn carrier and having its circumference partially provided with brushes. With this arrangement, the yarn rest or remainder must loosely hang somewhat spaced from the yarn carrier since, otherwise, the brushes cannot grasp the yarn remainder. The yarn carrier rests on said rotatable or rotary body by means of its head and its shank so that the yarn remainder will not contact said rotary body itself. When catching the yarn remainder, the said rotary body is covered by the unwound thread or yarn remainders so that the brushes are covered and are not any longer eifective for catching the start of the thread or yarn on the succeeding yarn carriers. The said yarn remainders caught by said rotary body have to be removed therefrom by hand. This is a considerable disadvantage with automatic looms. In particular, there exists the possibility that, in view of the brushes becoming ineffective in the above mentioned manner, one or more yarn carriers will not be freed from the yarn or thread remainder. In such an instance, the provision of such yarn remainder-removing device on an automatic loom is pnactically valueless inasmuch as it will not assure a proper functioning of the system. After the thread remainder has been removed from the yarn carrier, the empty yarn carrier drops into a collecting container.

There has also been suggested a device which, during the dropping of the ejected yarn carrier, catches the thread end of the yarn remainder by means of a rotary brush. The caught thread end is wound around a fixedly arranged helical spring and around the brush. Due to the rotation of said brush, the wound-up thread moves in axial direction and drops into \a separate container. During this procedure, the yarn carrier does not engage the rotating brush. With this arrangement, however, it is impossible to find the start of a thread end which is firmly wound upon the yarn carrier, because the catching of such stant of a thread end is to be effected only during the drop of the yarn carrier. Thus, also, this arrangement is unreliable and unsuitable for automatic looms. g

It is, therefore, an object of the present invention to provide a device for removing yarn rests or remainders from yarn carriers, which will overcome the above mentioned drawbacks.

it is a further object of this invention to provide a device as set forth in the preceding paragraph, which will also assure the removal of a yarn or thread remainder from the respective yarn carrier when the start of the end of the yarn remainder on said yarn carrier is firmly wound thereupon.

It is still another object of this invention to provide a ill device of the type set forth in the'preceding paragraphs which can easily be connected to any loom without requiring any material changes.

These and other objects and advantages of the invention will appear more clearly from the specification in connection with the accompanying drawings, in which:

FIG. 1 is a view and partial section of a device according to the presentinvention on a loom;

FIG. 2 is a section along the line II-Il of FIG. 1;

FIG. 3 illustrates a control mechanism shown in the lower portion of FIG. 2 on a larger scale than the latter;

FIG. 4 is a section along the line IVIV of FIG. 3;

FIG. 5 represents a section along the line VV of FIG. 4;

FIG. 6 shows the same mechanism as FIG. 3 but in a difierent position with regard to FIG. 3;

FIG. 7 likewise illustrates the arrangement of FIG. 3 but in a still different position with regard to FIGS. 3 and 6;

FIG. 8 is a cross section through an arrangement according to the present invention;

' FIG. 9 represents a section along the line 'IXIX of PEG. 8;

FIG. 19 is a section along the line X-X ot FIG. 8;

FIG. 11 represents a modification of the present invention.

The arrangement according to the present invention is characterized primarily in that brush-like stripping members are arranged on a portion only of the length of the rotary body in such a way that the stripping members contact the yarn carrier at the shank thereof only.

Referring, now, to the drawings in detail, FIG. 1 shows a shuttle 2 on a movable sley 1, said shuttle carrying an empty. wefit bobbin 3. Above the shuttle 2 there is arranged a bob-bin drum 4 mounted on a shaft 5. Shaft 5 is journalled in a loom (not illustrated). The bobbin drum 4 carries weft bobbins 6 having yarn wound thereon, said bobbins being held in a well known manner, for instance, by clamps 7. The arrangement furthermore comprises :a bobbin hammer 8 having connected thereto a bell crank lever 9 (see FIG. 2) which is journalled on a shaft it in the loom. The bell crank lever has linked thereto a tilta ble lever 11. The sley 1 furthermore carries a cutter 12 which is adapted to enter into cooper-ation with the tiltable lever 11.

Arranged below the sley 1 is a drop pas-sage or funnel 13. The side wall 14 of said drop passage or fiunnel 13 has an opening 15 for the discharge of the dropping weft bobbins. Funnel d3 tapers conically in a downward direction. The narrowest portion of said passage 13 has an opening 13a into which extends an arm 17 of a tiltable lever 16. The said lever 16 has a cam 18 (FIG. 3) and an arm 19 to which arm there is connected a threaded bolt 20. By means of nuts 2-1, a weight 22, may be displaced on the threaded bolt 24 and be held in its respective desired position. The tiltable lever 16 is connected to a bushing 24 (FIG. 4) which is journaled on a shaft 23. Shaft 23- is suspended on two fishplates 25a and 2.5!). A ball bearing 26 is provided on shaft 23 between bushing 24- -and a spacer ring 27. A pin 2-3 in shaft 23 serves, on one hand, as an abutment in axial direction and, on the other hand, prevents a rotation of fish plate 25b. Connected to the end of shaft 23 is a support 25. Fish plates 25a and 251; are journaled on a shaft 3% which, in its turn, is guided in arms 31. The arms 31 are connected to the passage or tunnel 13. A torsion spring 32 continuously urges the fish plates 25a, 25b, to turn toward the front wall 33 of the funnel !13 into the rest position shown in FIG. 3.

A shaft 35 is jo'u-rnaled on a support (FIGS. 1 and 8) a rotary body 37. Rotary body 37 is provided with four depressions (FIGS. 9 and 10), each or" which has ar-' ranged the-rein rollers 39. The rollers 39 are journal-ed in the rotary body 37. Respectively connected to the shaft ends 40 of the rollers 39 are pinions 41. A gear 42 meshing with pinions 41 is fixedly connected to a support 34. According to the embodiment of PEG. 8, the axes of the rotary body 37 and of the rollers 33 arranged parallel to each other. However, it is to be understood that they may also form an. angle with each other, as indicated in FIG. 11 in which the rotary body 37' is of conical shape. The latter is provided four depressions 38 arranged as shown in FIGURES 9 and 10. The rollers 39' are journaled in the rotary body $7. Respectively connected to the shaft ends 4% of the rollers 39' are p-inions 41. A gear -42 meshing with the pinions 41' is fixedly connected to a support 34.

Circumferentially arranged on the rotary body 37 between each two depressions 38 are brush-like stripper members 43. These stripper members may advantageously consist of bristles of synthetic material as, for instance, nylon, which are woven into fabric which then is glued to the rotary body. The stripper members or brushes 43 are arranged on a portion only of the length of the rotary body. In this way, the brushes &3 will contact the shank only of the bobbin, whereas the bobbin head will be free. In this way, there will be obtained a direct contact of the brushes 43 with the thread reserve 45 which is necessary for properly taking off the start of the thread. The bristles are shown in the illustrated embodiment as being directed radially outwardly, however, they may also be arranged in an inclined man ner. It is, of course, to be understood that, instead of using bristles of synthetic material, bristles of any other type may be employed. The radial length of the brushlike stripper members protruding beyond the rotary body is greater than half the difference between the diameter of the yarn carrier head and the diameter or" the shank.

That end of rollers 39 which is located within the range of the depressions 38 of rotary bodies 37 is provided with circumferential helical grooves. Thus, for instance, H6. 8 shows by way of example a saw toothsh'aped thread 44. However, also other thread types may be provided.

These rollers constitute thread discharge means that move thread collected on rotaiy body 37 by the stripper member 43 axially of the body and off the end thereof.

The lefthand end (FIG. 8) of the rotary body is provided with a collar 48 which has one sectionthereof designed as cam 4-9 (FIG. 3).

Operation The feeler, not illustrated in the: drawings, feels the weft bobbin 3 in shuttle 2. If this bobbin 3 has been unwound up to the thread reserve 45, the feeler will, in a manner known per se, actuate a release mechanism for the bobbins. To this end, a shiftable lever 11 has been lifted and brought into cooperation with the cutter 12 mounted on the reciprocating sley 1. The movement of the sley tilts the bell crank lever 9 so that the bobbin hammer 8 pushes a fill-ed bobbin 6 into the shuttle 2. The empty bobbin 3 is ejected downwardly and drops into the passage 13. Due to the shape of passage 13 and due to the heavier bobbin head 46, bobbin 3 will with its head down drop into the funnel 13 into the position 47, illustrated in dot-dash lines (FIGS. 1 and 6). The

bobbin 3 will then, by means of its head 46 push against 'arm 17 and tilt the tiltable lever 16 against the efiect of weight 22 into the position shown in FIG. 6. (Jam 18 will be pressed against the surface of collar 48.

The loom driving shaft or the crank shaft drives pulley 36 in the direction of the arrow 50 (FIG. 3) and thereby also the rotary body 37. During the notation of the rotary body 37, cam 4 will move into operative connection with cam 18. Cam 4% pushes cam 13 toward the left while tilting lever 16 rotates in clockwise direction until the abutment 51 hits fish plate 25a. The movement conveyed by cam 4-9 is transmitted to fish plates 25a, 25b, which carry out a rotative movement in clockwise di rection (FIG. 6), until the position shown in FIG. 7 has been reached. The bobbin 3 will now with head 46 first drop into the position 52, illustrated in FIG. 7 by dot-dash lines. lead 46 will then contact the surface 53. The bobbin with its shank portion will then drop through opening 15 in passage 13 while the shank'end will come to rest in support 29, as illustrated in FIGS. 1 and 8. The thread reserve will now get into con-tact with the circumference of the rotary body 37 in such a way that the brushes 43 will be located within the range of the thread reserve 45. Arm l7 prevents the bobbin in tilted-out position of the fish plates 25a, 25b and in tilted-out position of the tilting lever 16 from being rolled by the rotary body 37. When rotary body 37 rotates further, cam 18 is released by cam 49, and the fish plates 25a, 25b, will 'by torsion spring 32 be til-ted into their supporting position of FIG. 3. The tilting lever 16 is, by means of weight 22, rotated in counterclockwise direction until arm 17 abuts the front wall 33 (FIG. 3). in this position, cam 18 will be located outside the path of movement of cam 49 so that said cam will be able to rotate the dropped spool in an unimpeded manner. The dropped spool will be retained by ball bearing 26. Due to the rotation of the rotary body 37, the bobbin is likewise vrotated. Brushes 43 brush over the thread reserve 45 and detach the thread end. When said thread end has been detached, it is retained by the brushes and is wound around the rotary body 37.

During the rotation of the rotary body 37, the gears 41 roll on gear ring 42 and impart upon rollers 39 a radial movement of their own. If now the wound-0E thread ends have been rolled upon the rotary b0dy37,

these thread windings enter the threads or threaded Inasmuch as the rollers rotate 'as described above, namely, so that a screw mounted thereon would move from left toward the right (FIG. 8)

windings of the roller.

45 is ejected and drops into the position 47 in funnel 13.

In the manner described above, the tilting lever 16 as well as the fish plates 25a, 2512 are again moved from their FIG. 3 position into their FIG. 7 position. Due to the rotation of the rotary body 37 bobbin 3 in position 52 is carried along in the direction of the arrow 54 and drops into a container arranged therebelow. The dropping-in bobbin is prevented, by arm 17, from moving in the direction of the arrow 54.

As will be evident from the above, the present invention excels in simplicity. It may be connected to any loom without requiring any major changes. Also, the upport 34 and the rotary body 37 mounted thereon may be mounted on a table for purposes of manually stripping off the thread remainders from the bobbin. The arrangement according to the present invention may also be connected to spooling machines, or the like. i A further advantage according to the present invention consists in that the detached thread reserves are automatically conveyed into a container, which means that the rotary body 37 trees itself by means of the rollers 39. The brushes remain clean and eifective for the stripping off of the yarn remainders of-the next followingbobbins.

The direct contact of the stripper members with the yarn remainders also makes possible a detachment of thread starts of bobbins firmly wound upon the yarn carrier.

It is, of course, to be understood that the present invention is, by no means, limited to the particular constructions shown in the drawings, but also comprises any modifications within the scope of the appended claims.

What I claim is:

1. In a device for removing yarn remnants from a yarn carrier with a head portion and a shank portion, especially from a loom shuttle bobbin: a rotatable body, a plurality of brush-like stripper means arranged in circumferentially spaced relation on the periphery of said rotatable body, thread discharge means on the body between adjacent stripper means operable in response to rotation of said body to discharge thread from the body that is removed from a bobbin by said stripper means, and supporting means arranged adjacent said rotatable body for receiving and holding said yarn carrier with yarn remnants thereon adjacent said stripper means, said supporting means and said stripper means being located relative to each other in such a way that said stripper means will contact said yarn remnant-containing carrier at the shank portion thereof only when such carrier rests on said supporting means.

2. In a device for removing yarn remnants from a yarn carrier with a head portion and a shank portion, especially from a loom shuttle bobbin: a rotatable body, a plurality of brush-like stripper means arranged in spaced relationship to each other at and around the periphery of said rotatable body, a plurality of rotatable roller means arranged at said periphery and respectively interposed between said stripper means, means for rotating said roller means, and supporting means arranged adjacent said rotatable body for receiving and holding said yarn carrier with yarn remnants thereon adjacent said stripper means, said supporting means and said stripper means being located relative to each other in such a way that said stripper means will contact said yarn remnantcontaining carrier at the shank portion thereof only when such carrier rests on said supporting means.

3. An arrangement according to claim 2, in which said roller means are provided with helical grooves on the circumference thereof.

4. In a device for removing yarn remnants from a yarn carrier with a head portion and a shank portion, especially from a loom shuttle bobbin: a rotatable body, a plurality of brush-like stripper means arranged in spaced relationship to each other at and around the periphery of said rotatable body, a plurality of rotatable roller means arranged at said periphery and respectively interposed between said stripper means, gear means drivingly connected to said roller means for rotating the same relative to said rotatable body, and supporting eans arranged adjacent said rotatable body for receiving and holding said yarn carrier with yarn remnants thereon adjacent said stripper means, said supporting means and said stripper means being located relative to each other in such a way that said stripper means will contact said yarn remnant-containing carrier at the shank portion thereof only when such carrier rests on said supporting means.

5. In a device for removing yarn remnants from a yarn carrier with a head portion and a shank portion, especially from a loom shuttle bobbin: a rotatable body, a plurality of brush-like stripper means arranged in spaced relationship to each other at and around the periphery of said rotatable body, a plurality of rotatable roller means arranged at said periphery and respectively interposed between said stripper means, a plurality of pinions respectively connected to said roller means, stationary gear means common to and meshing with said pinions and having its axis substantially in alignment with the axis of rotation of said rotatable body whereby said pinions and said roller means respectively connected thereto will be rotated in response to a rotation of said rotatable body, and supporting means arranged adjacent said rotatable body for receiving and holding said yarn carrier with yarn remnants thereon adjacent said stripper means, said supporting means and said stripper means being located relative to each other in such a way that said stripper means will contact said yarn remnant-containing carrier at the shank portion thereof only when such carrier rests on said supporting means.

6. An arrangement according to claim 5, in which the periphery of at least some of said roller means is provided with saw tooth-like helical grooves having their pitch so arranged as to feed a thread received in said grooves to that end of said roller means which is remote from said pinions.

7. An arrangement according to claim 1, in which said stripper means comprise synthetic bristles.

8. In a device for removing yarn remnants from a yarn carrier with a head portion and a shank portion, especially from a loom shuttle bobbin: a rotatable body, a plurality of brush-like stripper means arranged at the periphery of said rotatable body and protruding radially outwardly beyond said periphery, thread discharge means on the body between adjacent stripper means operable in response to rotation of said body to discharge thread from the body that is removed from a bobbin by said stripper means, and supporting means arranged adjacent said rotatable body for receiving and holding said yarn carrier with yarn remnants thereon adjacent said stripper means, said supporting means and said stripper means being located relative to each other in such a way that said stripper means will contact said yarn remnant-containing carrier at the shank portion thereof only when such carrier rests on said supporting means, said stripper means protruding radially beyond the periphery of said rotatable body by a distance greater than half the difference between the diameter of the yarn carrier head portion and of the yarn carrier shank portion.

References Cited in the file of this patent UNITED STATES PATENTS 1,654,472 Stimpson Dec. 27, 1927 1,654,473 Stimpson Dec. 27, 1927 2,795,030 Stutz June 11, 1957 FOREIGN PATENTS 700,579 France Jan. 1, 1931 

1. IN A DEVICE FOR REMOVING YARN REMNANTS FROM A YARN CARRIER WITH A HEAD PORTON AND A SHANK PORTION, ESPECIALLY FROM A LOOM SHUTTLE BOBBIN: A ROTATABLE BODY, A PLURALITY OF BRUSH-LIKE STRIPPER MEANS ARRANGED IN CIRCUMFERENTIALLY SPACED RELATION ON THE PERIPHERY OF SAID ROTATABLE BODY, THREAD DISCHARGE MEANS ON THE BODY BETWEEN ADJACENT STRIPPER MEANS OPERABLE IN RESPONSE TO ROTATION OF SAID BODY TO DISCHARGE THREAD FROM THE BODY THAT IS REMOVED FROM A BOBBIN BY SAID STRIPPER MEANS, AND SUPPORTING MEANS ARRANGED ADJACENT SAID ROTATABLE BODY FOR RECEIVING AND HOLDING SAID YARN CARRIER WITH YARN REMNANTS THEREON ADJACENT SAID STRIPPER MEANS, SAID SUPPORTING MEANS AND SAID STRIPPER MEANS BEING LOCATED RELATIVE TO EACH OTHER IN SUCH A WAY THAT SAID STRIPPER MEANS WILL CONTACT SAID YARN REMNANT-CONTAINING CARRIER AT THE SHANK PORTION THEREOF ONLY WHEN SUCH CARRIER RESTS ON SAID SUPPORTING MEANS. 